2003
DOI: 10.1016/s0926-3373(02)00269-2
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Visible-light-active titanium oxide photocatalyst realized by an oxygen-deficient structure and by nitrogen doping

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Cited by 682 publications
(261 citation statements)
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“…4(b). Other studies made similar conclusions that visible light activity of N-doped TiO 2 was ascribed to V O which induced donor states located below the CB, while substitutional N acted as an inhibitor for e --h + recombination (Justicia et al, 2002;Ihara et al, 2004). This controversy makes it necessary to decouple the contributions of V O and N-doping in TiO 2 in future studies.…”
Section: Electron Transfer From the Impurity State To Tio 2 Cbmentioning
confidence: 80%
“…4(b). Other studies made similar conclusions that visible light activity of N-doped TiO 2 was ascribed to V O which induced donor states located below the CB, while substitutional N acted as an inhibitor for e --h + recombination (Justicia et al, 2002;Ihara et al, 2004). This controversy makes it necessary to decouple the contributions of V O and N-doping in TiO 2 in future studies.…”
Section: Electron Transfer From the Impurity State To Tio 2 Cbmentioning
confidence: 80%
“…Another influencing factor for early rutile formation with nitrogen doped TiO 2 is the increased formation of oxygen vacancies. Several researchers have demonstrated that nitrogen promotes the formation of oxygen vacancies within TiO 2 [2,7]. Oxygen vacancies have also been widely reported to lower the anatase-to-rutile transformation temperature.…”
Section: Discussionmentioning
confidence: 99%
“…However, further investigations into what causes visible light absorption of N-TiO 2 has subsequently been carried out by a number of researchers. Ihara et al [7] suggested that oxygen vacancies cause visible light activity and that the addition of nitrogen merely stabilises these oxygen vacancies. Visible light absorption through the addition of oxygen vacancies was also reported by Martyanov et al [2].…”
Section: Introductionmentioning
confidence: 99%
“…Los picos a 2927 y 2854 cm -1 observados en los espectros de los materiales sintetizados, pueden ser asignados a tensiones C-H e indicar la presencia de materia orgánica remante en los sólidos, relacionada con el ácido acético utilizado durante la síntesis [17,21]. Las señales que aparecen en el espectro del hidróxido de titanio (material MA) centradas a 3150 y 1401 cm -1 pueden resultar de modos vibracionales del tipo tensión y flexión características de enlaces N-H, mismas que pueden estar relacionadas con iones amonio (NH 4 + ) formados durante la disociación del NH 4 OH, especies que se encuentran adsorbidas en la superficie del material a bajas temperaturas y que actúan como fuente de nitrógeno, el cual se incorpora a la estructura del TiO 2 durante el proceso de calcinación [17,22,23] ), corroborando su presencia por XPS y sugiriendo que este anión identifica la presencia de nitrógeno estructural en la red del óxido de titanio [25][26][27]. Aunado a esto, las bandas situadas a 1452 y 1250 cm -1 también podrían indicar la nitruración del material.…”
Section: Espectroscopía Infrarrojaunclassified